Research On Supply Chain Trust Mechanism Based On Blockchain

With the development of economy and e-commerce,more and more enterprises respond to the increasingly fierce market competition by forming supply chains.Good cooperation between enterprises in the supply chain can reduce production costs,make enterprises response to market changes rapidly,and improve the competitive advantage of enterprises.However,at present,information asymmetry and incomplete information acquisition between supply chain enterprises lead to trust game and fraud among enterprises,leading to trust crisis and hindering the development of supply chain.An effective trust mechanism can improve the information sharing problems and reduce the risks in the supply chain.The traditional supply chain trust mechanism adopts the centralized management system,which makes it difficult to effectively manage all enterprises in the supply chain.In addition,the information openness is poor,transparency is low,and the reliability of information cannot be guaranteed,which makes it difficult to effectively evaluate the trust of enterprises and supervise the opportunistic behaviors of enterprises.Aiming at the existing problems of supply chain trust mechanism,this thesis conducts research on the supply chain trust guarantee strategy and supply chain transaction behavior supervision strategy.Firstly,this thesis proposes a trusted transaction data management strategy based on blockchain,which realizes the trusted management of transaction information on the supply chain and the sharing of transaction evaluation information from three aspects: external access trusted,transaction processing trusted and data storage trusted.Based on the transaction evaluation data accumulated in the blockchain,the dynamic trust evaluation strategy of supply chain enterprises is proposed to quantitatively evaluate the credibility of enterprises and supervise their behaviors.Finally,according to the trust mechanism proposed in this thesis,the prototype system is designed and implemented to verify its effectiveness.The main research work of this thesis is as follows:(1)To solve the problems of poor information openness and low transparency of traditional supply chain trust mechanism,this thesis proposes a supply chain data trust management strategy based on blockchain.Firstly,the participator nodes in the supply chain are managed and their operation rights are limited by the identity authentication mechanism based on blockchain.Then,the tracking records and trusted sharing of assets and transactions are realized through intelligent contracts.UCL is used to unify the indexing of transactions in order to solve the semantic heterogeneity problem in supply chain information management.Finally,TDPoS is used to confirm the transaction.This strategy realizes the trusted management of data,enabling all business objects in the supply chain to publish their own supply and demand business information,and to supervise and restrict each other's network system,thus establishing an initial trust relationship among enterprises.(2)Aiming at the problem of information distortion caused by source data fraud and corporate cooperative fraud,this thesis proposes a dynamic trust evaluation strategy for supply chain enterprises to monitor inter-enterprise trust.According to the accumulated transaction evaluation information in the block chain,the trust level of enterprises is quantitatively calculated from the local and global levels.Firstly,the global reputation evaluation algorithm is used to calculate the global reputation of the target enterprise.Then the local trust value of target enterprise is calculated quantitatively according to the local trust evaluation algorithm based on trust network.For enterprises with low long-term trust,the malicious node consensus elimination intelligent contract is invoked for management.In addition,the information of trust evaluation is distributed through UCL indexing and broadcast to improve the efficiency and security of information distribution.Compared with the traditional distributed trust evaluation algorithm,this algorithm has higher accuracy and efficiency.(3)Combined with the characteristics of dual-structure network,this thesis designs and implements a prototype system of supply chain trust mechanism verification based on blockchain.In the prototype system,the TDPoS algorithm and the dynamic trust evaluation algorithm of supply chain enterprises proposed in this thesis are tested and analyzed.The experimental results show that the TDPoS consensus algorithm is more efficient than the traditional consensus algorithm and does not need token support.Compared with the traditional method,the dynamic trust evaluation algorithm of supply chain enterprises has lower computational overhead and higher resistance to malicious nodes.